1998 EK9

1998EK9, 16913, 1987 BA, 1987BA, J87B00A, J98E09K

All data for this body: [vot]

MPC data
Name (number) 1998 EK9 (16913)
a 2.38569
e 0.13139
i / sin(i) 25.8792 / 0.43648
q 2.07224
Q 2.69915
ω 297.3482
Node 125.2907
m 187.0766
n 0.2675
Epoch 2460800.5
nobs 4117
nopp 22
Years observed 1987-2025
rms 0.67
Best values
[raw, vot]

Value Standard error
Parent
 
ap 2.385
ep 0.123
sin(ip) 0.445
G 0.150
H 13.340
Mass
D 11.66 0.041
pV 0.069 0.0014
Value
Rotational Period
Period quality None
Spectral Class None
Spectral Class Score
Proper elements data
[raw, vot]

ap ep sin(ip) Author Reference Method
2.3855 0.1233 0.4452 Novakovic_Radovic_Todovic 2003A&A...403.1165K Numeric-Nov-2024
Diameter data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
10.13 2.640 2.640 Masiero 2021PSJ.....2..162M NEATM
10.52 3.370 3.370 Masiero 2020PSJ.....1....5M NEATM
10.75 2.240 2.240 Masiero 2021PSJ.....2..162M NEATM
11.12 3.018 3.018 Masiero 2017AJ....154..168M NEATM
11.16 0.600 0.600 Tedesco 2002AJ....123.1056T STM
11.24 0.085 0.085 Masiero 2011ApJ...741...68M NEATM
11.77 0.047 0.047 Masiero 2011ApJ...741...68M NEATM
11.94 1.240 1.240 Nugent 2016AJ....152...63N NEATM
17.02 0.810 0.810 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
8.88 1.787 1.787 Ryan&Woodward 2010AJ....140..933R IRAS-STM
Albedo data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.029 0.0029 0.0029 Ryan&Woodward 2010AJ....140..933R IRAS-NEATM
0.047 0.0170 0.0250 Masiero 2021PSJ.....2..162M NEATM
0.050 0.0200 0.0200 Nugent 2016AJ....152...63N NEATM
0.061 0.0295 0.0295 Masiero 2017AJ....154..168M NEATM
0.066 0.0240 0.0390 Masiero 2021PSJ.....2..162M NEATM
0.068 0.0080 0.0080 Tedesco 2002AJ....123.1056T STM
0.078 0.0019 0.0019 Masiero 2011ApJ...741...68M NEATM
0.084 0.0770 0.0770 Masiero 2020PSJ.....1....5M NEATM
0.085 0.0030 0.0030 Masiero 2011ApJ...741...68M NEATM
0.107 0.0097 0.0097 Ryan&Woodward 2010AJ....140..933R IRAS-STM
G data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
0.15 MPC-2023-12-94 MPC-2023-12-94 Phot
H data
[raw, vot]

Value Uncertainty up Uncertainty down Author Reference Method
13.34 MPC-2023-12-04 MPC-2023-12-04 Phot